Leishmaniasis
What is Leishmaniasis?
Leishmaniasis is an infection caused by tiny parasites called Leishmania. These parasites spread to humans through the bite of infected sandflies. Sandflies are small insects found in tropical and subtropical regions around the world.
The disease comes in three main forms. Cutaneous leishmaniasis affects the skin and causes sores. Mucocutaneous leishmaniasis damages tissues in the nose, mouth, and throat. Visceral leishmaniasis, the most serious form, affects internal organs like the spleen, liver, and bone marrow.
Most cases occur in people who travel to or live in areas where the disease is common. This includes parts of Central and South America, Africa, the Middle East, and Asia. Early detection and treatment can prevent serious complications and help you recover fully.
Symptoms
- Skin sores that may become ulcers with raised edges
- Fever that lasts for weeks or months
- Weight loss and decreased appetite
- Enlarged spleen and liver
- Fatigue and weakness
- Pale skin or anemia
- Stuffy or runny nose
- Nosebleeds or difficulty breathing through the nose
- Sores in the mouth or on the lips
- Swollen lymph nodes
Symptoms may not appear for weeks or months after a sandfly bite. Some people with cutaneous leishmaniasis may only notice skin sores without feeling sick. Visceral leishmaniasis often causes more severe symptoms that worsen without treatment.
Concerned about Leishmaniasis? Check your levels.
Screen for 1,200+ health conditions
Causes and risk factors
Leishmaniasis occurs when infected sandflies bite humans and transmit Leishmania parasites. These sandflies are most active during evening and nighttime hours. The infection cannot spread directly from person to person. You can only get it through a sandfly bite or rarely through contaminated blood transfusions or needle sharing.
Risk factors include living in or traveling to tropical areas where sandflies live. Poverty, poor housing conditions, and sleeping outdoors increase exposure to sandfly bites. People with weakened immune systems face higher risk of developing severe disease. Malnutrition and conditions like HIV also make infections more likely and more serious.
How it's diagnosed
Doctors diagnose leishmaniasis through physical examination, travel history, and laboratory tests. Blood tests can detect antibodies to Leishmania parasites, which show if your immune system is fighting the infection. These tests work best for visceral leishmaniasis. Skin or tissue samples may be needed to confirm cutaneous or mucocutaneous forms.
Specialized testing is typically required to diagnose this condition. Talk to a doctor if you have symptoms after traveling to areas where leishmaniasis is common. They can order the right tests and create a treatment plan based on your specific situation.
Treatment options
- Antiparasitic medications prescribed by your doctor to kill the parasites
- Intravenous treatments for visceral leishmaniasis in hospital settings
- Topical or injectable treatments for skin sores in cutaneous forms
- Wound care and bandaging to prevent secondary infections
- Nutritious diet to support immune function and recovery
- Rest and adequate sleep to help your body heal
- Follow-up testing to confirm the parasites are gone
- Treatment of any complications like anemia or organ damage
- Preventive measures to avoid future sandfly bites when traveling
Frequently asked questions
The first signs depend on the type of leishmaniasis you have. Cutaneous leishmaniasis starts with a small bump at the bite site that grows into an open sore. Visceral leishmaniasis may begin with fever, fatigue, and weight loss. Symptoms can appear weeks or even months after being bitten by an infected sandfly.
You get leishmaniasis when an infected sandfly bites you and injects Leishmania parasites into your skin. Sandflies pick up the parasites by biting infected animals or people. The disease does not spread through person-to-person contact. Rarely, it can spread through blood transfusions or shared needles.
Leishmaniasis is most common in tropical and subtropical regions. This includes parts of Central and South America, Africa, the Middle East, and southern Asia. About 95% of visceral leishmaniasis cases occur in just seven countries. These are Brazil, Ethiopia, India, Kenya, Somalia, South Sudan, and Sudan.
Yes, leishmaniasis can be cured with proper treatment. Antiparasitic medications can kill the parasites and clear the infection. Treatment success depends on the type of leishmaniasis, how early it is detected, and your overall health. Some skin sores may heal on their own, but treatment prevents spread and complications.
Blood tests for leishmaniasis look for antibodies your immune system makes against the parasites. The Leishmania Ab IgG test detects these antibodies and indicates active or past infection. Doctors may also examine blood or tissue samples under a microscope to find the parasites directly. Multiple tests may be needed for accurate diagnosis.
No, leishmaniasis is not contagious through casual contact between people. You cannot catch it by touching someone with the disease or being near them. The only way to get leishmaniasis is through a sandfly bite or very rarely through blood transfusion or needle sharing. Person-to-person transmission through normal interaction does not occur.
Recovery time varies depending on the type and severity of infection. Cutaneous leishmaniasis skin sores may heal in a few months with or without treatment. Visceral leishmaniasis requires several weeks of treatment and monitoring. Some people need follow-up care for months to ensure the infection is completely gone.
Untreated leishmaniasis can cause serious complications. Cutaneous forms may leave permanent scars or spread to mucous membranes. Visceral leishmaniasis can be fatal if not treated, causing severe organ damage and bleeding problems. Mucocutaneous leishmaniasis can destroy tissues in your nose, mouth, and throat, leading to disfigurement.
Yes, you can reduce your risk through protective measures. Use insect repellent containing DEET on exposed skin. Wear long sleeves and pants, especially during evening and nighttime hours when sandflies are active. Sleep under fine-mesh bed nets treated with insecticide. Avoid outdoor activities during peak sandfly hours when possible.
People with weakened immune systems face the highest risk for severe disease. This includes individuals with HIV, those taking immunosuppressive medications, and people with malnutrition. Young children and older adults may also develop more serious infections. Anyone living in or traveling to areas where leishmaniasis is common should take preventive measures seriously.